Breech bolt with extractor and magazine-receiver assembly



Dec. 26, 1961 R. L. BROWN ETAL BREECH BOLT WITH EXTRACTOR AND MAGAZINE-RECEIVER ASSEMBLY 2 Sheets-Sheet 1 Filed Jan. 13, 1958 FIG-l INVENTORS RICHARD L. BROWN BY EDWARD L. MORROW Zia J. 5%

FIG-2 Dec. 26, 1961 R. L. BROWN ET AL BREECH BOLT WITH EXTRACTOR AND MAGAZINE-RECEIVER ASSEMBLY Filed Jan. 13, 1958 2 Sheets-Sheet 2 FIG-3 IN VEN TORS RICHARD LBROWN BYEDWARD L.MORROW United States 3,014,303 BREECH BOLT WITH EXTRACTOR AND MAGAZINE-RECEIVER ASSEMBLY Richard L. Brown, North Branford, and Edward L. Morrow, Bridgeport, Conn., assignors to Olin Mathieson Chemical Corporation Filed Jan. 13, 1958, Ser. No. 708,731 3 Claims. (Cl. 42-25) The present invention relates to firearms and in particular to cartridge feeding devices.

In general, cartridge feeding devices or magazines are adapted to connect removably with a firearm receiver, in one fashion or another, so that cartridges disposed within the feeding device are under the influence of a force active in a direction which tends to advance or feed the cartridges to a position from which a projection of the bolt or similar element is operable to sweep the cartridge into the chamber in sequential fashion.

In such firearms the main cartridge carrying element or the body of the magazine projects outside the receiver while a lip portion or single cartridge carrying element of the magazine usually projects into the receiver. The bolt body is displaced from the magazine including the lip poratent braces structure which permits the round to be chambered to be aligned along a longitudinal axis which is common to the longitudinal axis of the chamber while the round is still disposed in the magazine.

Accordingly, it is a particular feature of the present invention to provide a magazine adapted to cooperate with a bolt so that the bolt may be received, in reciprocatory fashion, into the magazine along the same axis that the round posed for ch'ambering is received.

Another feature of the invention embraces the provision of a firearm in which the breeching face of the bolt is operable to sweep through a magazine to pick up and to chamber a round of ammunition where the bolt and the round move along a line which is coaxial with the longitudinal :axis of the chamber.

A firearm embracing certain features of the present invention may comprise a receiver, a magazine detachably secured to the receiver, a chamber communicating with the receiver, a bolt slidably mounted within the receiver and movable from an open position to a closed position, said bolt having a main body portion and said magazine having a portion thereof projecting into the receiver and adapted to straddle the body portion of the bolt when the bolt is in the closed position, an extractor pivotally mounted to the bolt and operable when the bolt is moved manually to the open position to withdraw a cartridge from/the chamber and to deposit the cartridge in. a magazine, said magazine being detachable from the-receiver and being operable to remove said withdrawn cartridge from the firearm. A

Other features and advantages of the present invention will become more apparent from an examination of the succeeding specification when read in conjunction with the appended drawings wherein;

FIG. 1 is a sectional view, in elevation, of 'a firearm with'which the principles of the present invention may be utilized; Y

FIG. 2 is a transversesectional view of the firearm of FIG. 1 as viewed in the plane of line 2-2; and

FIG. 3 is a schematic view. showing the disposition of 3,014,333 Patented Dec. 26, 1961 arm having a blow-back action, obviously the principles thereof are equally applicable to firearms utilizing other well known operating principles.

The receiver 10 is formed with a pair of opposed upstanding wall portions 16 and 17 adapted to receive corresponding wall portions 18 and 19 of a magazine indicated generally by the reference numeral 21.

As is more apparent in FIG. 2, sidewalls 22 and 23 of the magazine are received within the receiver 10 and terminate in a pair of lips 24 and 26.

It is noted that the lips are arcuate and define in cross section a portion of a semi-circle.

The forward wall 19 of the magazine is formed with a protuberance 27 adapted to abut against the top of the receiver wall 17 while the opposed or afterwall 18 of the magazine is formed with a shoulder 28 cooperating with a pivotally mounted latch 29 carried by the receiver wall 16.

The lips 24 and 26 of the magazine rest upon arcuate lugs 31 and 32 and cooperate with the lug 27 to maintain the position of the magazine with respect to the receiver. The latch 29 operates to lock the magazine to the receiver in releasable fashion.

The bolt 13 is shown in the closed position in FIG. 1 and it is noted that the main body of the bolt is straddled by the arcuate lips 24 and 26 so that when the bolt is withdrawn to the left it passes through a magazine. In the course of the motion of the bolt to the left, a shoulder 33 thereof engages a corresponding shoulder 34 formed upon the ejector 15 and is operable upon continued motion to the left to clear the loading port 11. As soon as the bolt 13 is clear of the loading port a suitable spring device operates to move a round 36 downwardly into contact with the lower portion of the magazine, specifically the arcuate lips 24 and 26.

At this time it is noted that the bolt, the round disposed between the arcuate lips 24 and 26 and the chamber 37 of the firearm have a common longitudinal axis (FIG. 3). Thereafter when the bolt is advanced to the right towards the chamber a breeching face 38 of the bolt is operable to sweep the round from the magazine into the chamber.

At this time it is well to note that if one desires to withdraw a live round from the chamber it is quickly done by manually withdrawing the bolt whereupon the extractor 39 is operative to haul the cartridge out of the chamber back into the magazine.

As shown and described in a copending application S.N. 708,732, filed January 13, 1958, entitled Inertia Ejector, the compressive force exerted by the ejector 15 I is not appreciable and does not interfere with the return of the cartridge to the magazine.

After the live cartridge has been returned to the magazine, the magazine including the removed cartridge may be removed from the receiver.

It is anticipated that a variety of modifications and variations of the present invention may be devised without departing from the spirit and scope thereof. For example, it is anticipated that the principles of the present invention will apply to a feeding device wherein cartridges are fed into a firearm by means of a belt or chain.

What is claimed is:

I. In a firearm, a magazine-receiver assembly comprishaving a main body portion, said magazine projecting into the receiver and being operative to straddle substantially the full body portion of the bolt when the bolt is in the closed position, an extractor pivotally mounted on the bolt and operable when the bolt is moved to the open position to withdraw a cartridge from the chamber and to deposit the cartridge in the magazine, said magazine straddling the withdrawn cartridge and being detachable from the receiver operative to remove said withdrawn cartridge from the firearm.

2. In a firearm, a magazine-receiver assembly comprising a magazine, a receiver, a barrel having a chamber, a bolt slidably mounted within the receiver and movable from an open position to a closed position, feed lips formed integral with the magazine and projecting into the receiver and being operative to receive the bolt when the bolt is in the closed position, an extractor pivotally mounted on the bolt and operable when the .boltis moved to the open position to withdraw a cartridge from the 4 chamber and to deposit the cartridge in the magazine in the region of said feed lips, said magazine including the feed lips being detachable from the receiver and being operative to remove said Withdrawn cartridge.

3. The magazine-receiver assembly of claim 2 wherein the feed lips define a portion of a semi-circle in cross section, the center of said semi-circle being disposed on a line defining the longitudinal axis of the bolt and the chamber.

References Cited in the file of this patent UNITED STATES PATENTS 839,911 Wesson Jan. 1, 1907 896,453 Mangle Aug. 18, 1908 1,359,365 Hammond Nov. 16, 1920 .15 2,365,087 Lanchester Dec. 12, 1944 2,659,994 Yale Nov. 24, 1953 FOREIGN PATENTS 328,433 Germany Oct. 28, 1920 

